PERC score
| Age < 50 years |
| Pulse < 100 beats/min |
| Pulse ox > 94% |
| No unilateral leg swelling |
| No hemoptysis |
| No recent surgery |
| No prior DVT or PE |
| No oral hormone use |
References:
- Kline JA, Mitchell AM, Kabrhel C, Richman PB, Courtney DM. Clinical criteria to prevent unnecessary diagnostic testing in emergency department patients with suspected pulmonary embolism. J Thromb Haemost 2004;2:1247-55.
